// Modules to control application life and create native browser window
const {app, BrowserWindow,ipcMain} = require('electron')
var shell = require('shelljs')
// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow () {
    // Create the browser window.
    mainWindow = new BrowserWindow({width: 800, height: 600})

    // and load the index.html of the app.
    // mainWindow.loadFile('build/index.html')
    mainWindow.loadURL('http://localhost:3000/')

    // Open the DevTools.
    mainWindow.webContents.openDevTools()

    // Emitted when the window is closed.
    mainWindow.on('closed', function () {
        // Dereference the window object, usually you would store windows
        // in an array if your app supports multi windows, this is the time
        // when you should delete the corresponding element.
        mainWindow = null
    })
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow)

// Quit when all windows are closed.
app.on('window-all-closed', function () {
    // On OS X it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== 'darwin') {
        app.quit()
    }
})

app.on('activate', function () {
    // On OS X it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (mainWindow === null) {
        createWindow()
    }
})


//与子进程交互
ipcMain.on('asynchronous-message', (event, arg) => {
    if(arg){
        if (!shell.which('git')) {
            shell.echo('Sorry, this script requires git')
            shell.exit(1)
          }
        shell.exec('roscore',function(code, stdout, stderr) {
            console.log('Program output:', stdout)
        })      
        setTimeout(()=>{            
            shell.exec('roslaunch ls01d ls01d.launch',function(code, stdout, stderr) { 
                console.log('Program output:', stdout)
            })
        },5000)
    }
    event.sender.send('asynchronous-reply', 'pong1')
  })